I need to look up where I read it (Vaction Magic, DVC) but I belive it should have one of the 5 pools at SAB closed at different times. I would be really disapointed if they closed the shallow sand bottom area when we were there. We are going Feb 25th - March 4th and it should all be done by Feb 25th.
BTW, we always swim at WDW, no mater what time of year. Last Jan we had a great time in the WL pool. When you come from where it is really cold, 75 deg is great swimming weather, and sometimes it is even warmer then that in Jan, Feb, and March. Last Jan is was 80's for 5 out of the 7 days we were there. The 1st time we ever stayed at Y&B it was in the 50's every day. The last day it got to the mid 60's and we were out in that pool. (this was Feb 2001.)